85240215 has 16 divisors (see below), whose sum is σ = 151538400. Its totient is φ = 45461376.

The previous prime is 85240171. The next prime is 85240223. The reversal of 85240215 is 51204258.

It is a happy number.

It is not a de Polignac number, because 85240215 - 2⁶ = 85240151 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 315570 + ... + 315839.

It is an arithmetic number, because the mean of its divisors is an integer number (9471150).

Almost surely, 2^85240215 is an apocalyptic number.

85240215 is a deficient number, since it is larger than the sum of its proper divisors (66298185).

85240215 is a wasteful number, since it uses less digits than its factorization.

85240215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 631423 (or 631417 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 27.

The square root of 85240215 is about 9232.5627536454. The cubic root of 85240215 is about 440.0967676285.

The spelling of 85240215 in words is "eighty-five million, two hundred forty thousand, two hundred fifteen".